|
Sunset Speedway
Thunder Car, 2009
This set of rules is designed as a basic
guideline. All cars are subject to technical inspections by random
selection at the end of each race. Any part of the car not specifically
covered in these rules must remain stock.
The Thunder Car division is open to any make of
North American built automobile having a factory listed wheelbase of
101" or more, for the make, model and year being raced. No
convertibles, four wheel drive vehicles or station wagons will be
allowed. Mosport permits full size trucks, Sunset permits compact
trucks. The word stock when used herein shall mean unaltered, as
factory available and produced by O. E. M. for the make, model and year
of the car being raced. That excludes all after market "High
Performance" parts, and all decisions and rulings shall be based on
data obtained from the Canadian Service Data Book.
SPECIFICATIONS
APPEARANCE
Cars must not be excessively rusted and must be
presentable in appearance. Cars that are considered unsafe or improperly
prepared will be rejected by the tech committee.
BATTERY
Must be located behind the drivers seat securely
fastened and in a sealed container e.g. a marine battery container with
lid if in driver’s compartment.
BODY
Body must be steel and stock in appearance to the
original vehicle, with no chopping, channeling or sectioning allowed.
Body must be complete with all doors, fenders, quarter panels, hood,
trunk and roof as well as both bumpers. All moldings, door handles, name
plates and lights must be removed. Tires must be inside fenders &
scrub rails. Truck body alterations must be approved by tech.
BUMPERS
(A)Bumpers must be mounted in stock position with
no sharp edges exposed. After market nose and tail cones allowed. Chains
or cables must be installed from the bumper to the frame for safety
reasons. A fabricated bumper reinforcement may be run but stock bumper
or cover must be over top. Tow chains or cables are required on both
front and rear bumpers.
B) GROUND CLEARANCE
Minimum frame and body height is 6" or 4”
body height with side skirt.
C) HOOD AND TRUNK LID
No hood openings allowed. Inner hood and trunk
lid bracing may be removed. If original hood / trunk hinges are used,
then 2 pins must be used, If not hinged, 4 pins are required. Rear
spoiler allowed but may not extend beyond rear edge of rear deck panel
and must follow the contour of the rear deck lid. Maximum 5" by
width of rear deck. No side pods or bracing of rear spoiler.
D) SCRUB RAILS
Side bars must extend no further forward than the
rear of front wheel opening, and no further rearward than front of the
rear wheel opening, maximum 1”x 2” welded or bolted to roll cage. No
sharp edges. When bolting on scrub rails, you must use carriage bolts
(or round-headed bolts), if hex head bolts are used, they must be
counter sunk. 14”X 40”16 gauge metal recommended to go between the
cage and the door skin.
E) WHEEL OPENINGS
Original wheel arches may be removed/trimmed for
tire clearance. Inner splash aprons in the front fenders must be
removed.
F) WINDSHIELD
Windshield is a must. Windshields must be safety
glass or lexan with 2 center braces and 4 safety clips –2 at top of
window and 2 at bottom of window. No plexiglass screens or half
windshields allowed. The top 5”of windshield must be kept clear for
Speedway division sponsors.
BRAKES
All four wheels must be working. Rotors, calipers
and spindles may be used from
different models. Single piston steel calipers
only. No brake lines allowed in the driver compartment. Only
factory stock rear disc brakes allowed if drum brakes not available for
that make and model and must run a 50 lbs weight penalty on rear wheel
drives. Brake proportioning valve allowed.
SUSPENSION AND SUSPENSION
A) ROLL CAGE & FRAME
Must be stock steel frame with no holes drilled
for lightening. Front and rear sub or Unibody frames must be attached
with 2 x 3 hollow or box tube with a minimum wall thickness of .095. A
full roll cage constructed out of 1 3/4 x .095 min. round steel tubing
is mandatory. Roll cage must be symmetrical in all directions. A minimum
of four horizontal door bars on the drivers side with a minimum of two
vertical bars between each horizontal bar. “X”type bars will be
allowed on passenger side. Left leg protection bar must be installed
between the roll cage and the left front frame rail. Dash bar required,
along with an “X”type member across and behind driver. A so called
“Petty”bar recommended to run from center of cage to upper right
front halo. A front engine bay hoop is allowed and may connect directly
to main cage. Bracing running from top of cage towards the rear, should
extend beyond fuel cell area before attaching to rear frame rails. All
welds must be electric or mig and will be subject to the approval of
tech inspectors. No offset cages allowed. All roll bars in the drivers
area must be properly padded and taped. All suspension mounting points
must remain in their stock locations. Front cross member may have snout
removed and plated for center link clearance. Structural X ing
will be permitted in the following areas of the chassis. Main frame
rails may have X bracing under the floor in the center section of the
car. Rear clip may have X bracing above or under the fuel cell area.
Downward supports from main cage hoop to rear clip may have X bracing.
Rear frame sections may have 2”x3”replacement tubing from top of
kick-up rearward. Must retain original appearance.
B) SHOCKS
After-market racing shocks will be allowed but
must be non rebuildable, stock style steel shocks in stock locations
with stock style mounts.
C) SUSPENSIONS AND FRAMES
All suspension and frame components must be stock
if not stated otherwise. No modification of stock suspension locating
points. Wheelbase must be a minimum of 101”. Springs and steering
components may be interchanged. All control arm rubber bushings may be
replaced with urethane or heavy plastic, steel, aluminum, or brass.
Tubular upper control arms permitted. Mono-ball type bushings will not
be allowed. Link kit lengths may vary side to
side. Springs may be stock or after market with a minimum size of 4 inch
outside diameter. OEM rubber mounting
adapters on rear springs will be allowed. Top rear spring mounts may be
manufactured but in stock location. Multi-hole spring shackles will not
be permitted on leaf spring applications. Rear load bolts
and front spring adjusters permitted. No Howe calipers, spindles,
sway bar or steering parts.
D) WHEEL CAMBER
Strut cars may alter front strut towers to adjust
camber.
COOLING SYSTEM
No antifreeze permitted, An overflow can must be
installed on the firewall, behind the right front tire. Aluminum
radiators permitted and electric fans permitted.
EXHAUST SYSTEM
Muffler(s) are mandatory. Catalytic converter may
be removed. Exhaust pipes must exit within 18" of the rear wheels.
Pipes to be cut flush to the body and above the frame rail or turned
down at the exhaust end and exit under car. Exhaust pipes should be
firmly mounted high enough to avoid contact with the track surface
during racing conditions. The exhaust cannot have any sharp edges or
protrude outside of the body line. Original cast iron exhaust manifolds
only. No Ram Horn manifolds or headers permitted. Maximum 2-1/4”O.D.
pipe size before muffler and maximum 3“after muffler. Magna flow
muffler #11215 (2-1/4”), #11216 (2-1/2”), or #11219 (3”)
recommended (mandatory at Mosport). Enter step-up to muffler to be a
max. of 6”long. No e-vac system allowed.
FUEL
Pump fuel or track fuel permitted. The gasoline
shall not be blended with alcohols, ether or other oxygenates. It shall
not be blended with aniline or its derivatives, nitro compounds or other
nitrogen containing compounds. No NOS systems.
FUEL SYSTEM
A) FUEL CELL
Is Mandatory and must be mounted in the center of
the trunk area, with filler inside trunk. Fuel cell maximum recommended
capacity –15 gallons. The fuel cell must be separated from the
driver's compartment by an all metal firewall. There can be no openings
in the firewall and any holes must be filled in with metal. No filler
neck or fuel line is permitted inside of the driver's compartment. The
fuel cell must be firmly secured with steel straps to the floor of the
trunk. Minimum of two straps front and back, one side to side (straps
must be steel and a minimum of 1”x 1/8”flat strap or equivalent). A
fuel cell protection bar is mandatory. Minimum 1 ľ inch O.D. .095
inches thick. The bottom of the fuel cell may be no lower than 13”from
the ground to bottom of cell, and must be centered in the chassis from
side to side. No electric fuel pumps allowed unless on fuel injected
vehicles. All filler caps must be non-vented. No car will be permitted
to run if any sign of fuel leakage is found. The mounting of the fuel
tank is at the discretion of the tech inspector. Steel cased fuel
filters only. Cell ground strap and fuel cap attaching device are
mandatory.
B) FUEL SHUT-OFF
There must be a fuel shut off valve in working
order and mounted in the rear firewall or window parcel shelf accessible
by safety personal. It must be brightly and neatly marked "ON"
and "OFF".
IGNITION & CHARGING SYSTEM
OEM 12 volt stock ignition, Must consist of stock
or stock replacement parts only. No after market high performance
ignition systems or printed circuit type modules. Charging system
is optional. Clearly marked KILL SWITCH mandatory in main battery line
or use of Ford solenoid is permitted. Clearly marked KILL SWITCH to the
ignition on each side of the dash is mandatory.
INTERIOR
With the exception of the driver's seat, all
upholstery materials and trim and padding must be removed. Front and
rear firewalls must have all holes and openings covered with sheet
metal. Area between fender and firewall must be filled with sheet metal.
Front firewall may be fabricated but must remain in stock location. Any
holes or openings in the floor pan or trunk area must be covered with
sheet metal. Original floor pan must be retained on drivers side of
interior. A fabricated interior may be used on the passenger side
of car. For transmission clearance floor pan may be raised 12”above
original position of drivers floor pan. Passenger side floor may
drop back down to original height or maintain height of 12”to
passenger door. Rear firewall may be fabricated. Rear firewall may start
behind seat at base of roll cage and extend rearward to base of rear
window opening. Rear firewall may not exceed height of rear deck. Any
and all fabricated interior must be built with a minimum of .022 gage
sheet metal. One stock interior mirror is permitted. No fuel or brake
lines or fuel filters permitted in the driver's compartment. No plastic
gage lines. Roll bar padding is mandatory.
PAINT AND LETTERING
Only those cars who are entered in the Thunder
Car division and registered are permitted to pre number their car.
Numbers of members must be on the sides of the car in large (minimum
18") letters in a color that clearly contrasts to the paint job on
the car. All cars of non-members must have sides and roof clear so the
number assigned by the track official can be placed on the car.
Sponsor's name and logo may be placed any other place on the car.
4" number required on right front of car. Vulgar words and
expressions are not permitted.
RADIOS
No radios unless track authorized one-way.
REAR AXLE
Welded locked rear ends permitted. Steel
Mini-spools are allowed. No posi, full aluminum or full spools allowed.
Rear end housings may be interchanged year to year. ( eg. 8 ˝ “rear
end may be used to replace a 7 ˝ “rear end ). A Ford 9”
differential may be used. Stock location and rear drum brakes.
SAFETY
A) HELMET & APPAREL
Driver’s fire suit is mandatory. No coveralls.
Driver and suit must maintain clean looking appearance. Fireproof
gloves, neck collar, balaclava, underwear, socks, and shoes are
recommended. No nylon shoes allowed. A Snell 2000 SA or newer approved
racing safety helmet and complete driver’s racing suit must be worn in
all practice and race events and until car is parked in pit area.
B) BELTS AND HARNESS
All cars must be equipped with a quick release
type, 5 point harness with a minimum 3" lap belt and shoulder
harness of 3", properly affixed to the roll cage or chassis with
aircraft quality bolts, no less than .375 (3/8) inches in diameter. Head
restraint strongly recommended. Seat belts must be dated and be in
excellent condition.
C) FIRE CONTROL
Cars must have a 2 ˝ lbs minimum fire
extinguisher with either a steel or aluminum head mounted in a steel
mounting bracket and must be bolted down, and within driver’s reach
with seat belts fastened. Fire extinguisher must be new or serviced and
inspected each year and dated no later than January 1st of the current
year.
D) SEAT
An aluminum racing seat must be used, bolted to
roll cage, not bolted to the floor. When mounting seat use minimum
3/8”bolts with large washers to hold racing seat to seat framework.
Minimum of two bolts on the seat back and two bolts on the seat bottom.
Seat must be positioned completely to the left of the centerline of the
car. An approved head restraint must be made of some energy absorbing
material. Headrest side plates recommended.
E) WINDOW NET
Window net mandatory with minimum 3/8 inch rod.
Must have quick release.
TIRES
TRACK TIRE RULE WILL APPLY, Specific track tire
will be mandatory. (HOOSIER).
TRANSMISSION
You must use automatic transmissions unless your
engine size is 3.5 liter or less in which case you may run a factory
stock standard transmission, clutch and flywheel but scatter protection
must be used. No racing automatics. No after market valve bodies or
manual valve bodies allowed. Torque converters must be stock and be a
minimum of 11”diameter on V8s. After market shift kits and shifters
permitted. All cars must have a working reverse gear. Transmission
coolers are permitted but cannot be mounted in the drivers compartment.
Power glide transmissions will be allowed with a 50 lbs penalty. Drive
shafts must be stock, steel and painted white. Two steel drive shaft
loops to fully enclose drive shaft are mandatory. Loops must be no less
than 2 inch wide and 1/4 inch thick and must be fastened to the chassis
front and rear.
WEIGHT
55% left and 50% rear with 2 two barrel carb and
6 cyl. cars. Minimum total weight 3150 lbs for V8s and 2800 for track
approved V6s including driver. 100 lbs penalty for fuel injected V8s. No
topping up with fuel after the feature. When adding ballast it must be
in blocks of no less than 5 pounds, bolted securely, painted white, be
numbered and have min. 6”ground clearance.
WHEELS
No reverse or aluminum type rim permitted. Steel
only. Maximum rim width bead to bead: 8". Heavy duty or racing rims
may be run on all four wheels. Right front wheel MUST be a racing rim.
Minimum of 5/8”studs required.
ENGINES :
BLOCK ASSEMBLY
Only engines that were factory available for the
make, model and year being run are permitted. No modifications to engine
block, cylinder head, crankshaft, camshaft or connection rods unless
specified. Maximum Cubic In. GM- 350 plus.040 for clean-up
FORD- 351 ““
DODGE- 360
““
Block may be zero decked. No part of the piston
can protrude above block deck.
PISTONS
OEM cast or forged pistons allowed. No high
performance pistons.
CAMSHAFT
OEM style
Hydraulic cams and lifters only, Double
roller timing chain allowed.
Maximum Valve Lift: GM 410
Ford 448
Dodge 412
CARBURATION
Carburetor to be stock only as from factory. Must
bolt to original factory intake with no adapters. (Two barrel cast iron
G.M. Intake) The following are mandatory: two throttle springs running
in two different directions, throttle stop at the carb, solid linkage
(no throttle cable) and a toe bar. Cold air boxes are permitted, as long
as they fit under the hood. No air ducting of any type allowed into the
air box. CHRYCO may use quadrajet carb. Fuel injected motors may be used
if it is available in the make/model/year of vehicle being run. Choke
accessories may be removed. No adapter plates allowed. No truck
carburetors. Rochester carburetor throttle body max. bore diameter is
1-11/16”. Any stock boost (secondary) venturi allowed.
Carburation:
One R4412-500 C.F.M. Holley factory stock
produced two barrel carb. only. The only changes allowed are jets; power
valve and removal of choke parts. Two throttle return springs and stop
are mandatory. Carb. hats allowed. Air cleaners are mandatory. An
accelerator toe bar mandatory. Air filters boxes are permitted. No boost
venturi below the throttle plate. No ram air systems. A quick-change jet
kit (part #3425 float bowl) may be used. No Keith Dorton performance
carburetors.
Holley factory stock measurements are as follows:
ź
Metering
block must have the following ID# stamped on it. Factory stock
#5924 or#5925. The #10570 will appear on
replacement or service metering
blocks.
ź
Metering
block power valve channel restriction ports (2 holes behind the
power valve) maxi. .0635"
ź
Metering
block idle feed restriction ports (2 holes) maximum: .035"
ź
Metering
block main passage to discharge nozzle (2 holes) maximum: .141"
ź
Main
body high speed air bleeds (2 holes) maximum: .028"
ź
Main
body idle speed air bleeds (2 holes) maximum .074"
ź
Butterfly
(throttle plate) thickness: .0398" - .0438"
ź
Hole
in butterfly: .090"-.096"
ź
Butterfly
must have stamped on it ID#215
ź
Throttle
shaft diameter .368"-.369"
ź
Throttle
shaft thickness at flat of shaft: .152"
ź
Venturi
bore diameter: 1.373"-1.377"
ź
Boost
venturi inner bore diameter .377"-.383"
ź
Boost
venturi outer diameter .610"-.630"
ź
Throttle
bore diameter 1.6855"-1.6865"
ź
all
air entering the engine for combustion purposes must enter through the
air horn of the carb
1 Ľ”Fibre or wood spacer between carb and
intake. No high rise or aluminum intakes allowed. No 4BBL
Carbs.
COMPRESSION RULE
Maximum of 9.0 –1 Whistle up to 9.4 - 1 if
checked hot.
CYLINDER HEADS
Must be stock for engine being run, No head
modification. NO DOUBLE BUMP
TYPE HEADS
- NO 2.02 valves. No vortec V8 heads.
VALVES. Cylinder heads may be changed from year
to year provided they are not high performance. Stock OEM rocker arms
and ratio only. Screw in studs and guide plates are permitted.
Valve Size: GM Max. 1.94 intake and 1.60 exhaust
Cleveland Max. 2.04 intake and 1.65 exhaust
Windsor Max. 1.84 intake and 1.64 exhaust
Chrysler Max. 1.88 intake and 1.60 exhaust
ENGINE MOUNTS
Solid engine and transmission mounts are
permitted but engine must remain in stock location or equivalent.
FUEL PUMP
Stock location mechanical pumps only unless
running fuel injection.
HEIGHTS
Engine height will be a minimum of 12 inches
measured from ground to center of crankshaft.
INTAKE MANIFOLD
Original OEM cast iron manifolds only. Only OEM
type gasket allowed, no doubling of gaskets under carb. No high rise or
aluminum intakes.
VALVES
Valve stem diameter must be stock. Stainless
steel or stock type valves are allowed. No turning of valve stems
permitted. Undercut and light weight valves are not permitted. OEM
rocker arms and ratio only. Dodge may use adjustable rockers.
WATER PUMP
No aluminum pumps allowed on GM, stock OEM
replacement pumps only. Aluminum pulleys allowed.
OIL PAN AND LUBRICATION
Extra capacity after
market wet sump oil pans are allowed.
OPTIONAL SEALED GM CRATE ENGINES
1. All engines to be purchased through Sunset Speedway.
2. All engine repairs to be performed by Stefco Racing.
3. Pick up and delivery of engine is the owner's responsibility.
4. Engine must be resealed by a Sunset Speedway Official before it is
released from Stefco Racing - $75.00 fee.
5. Any repairs completed by other than the approved source (Stefco), will
be subject to re-inspection by Stefco and resealing by Sunset officials.
Driver must supply intake manifold so that motors may be sealed. Motors
will be delivered complete with 4 bolt main, supplied intake installed, 6
3/4” balancer, water pump, oil filter, spark plugs and circle track pan
if supplied or ordered.
Absolutely
no modifications are allowed. To be used only as delivered by Sunset
Speedway.
This
motor is to be used in conjunction with all other Sunset Thunder Car
rules. Sunset Speedway reserves the right to confiscate any sealed motor
for inspection. Anyone found tampering with a GM crate motor will be
suspended for one calendar year.
|